Two-way plow



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J. R. ORELIND TWO-WAY PLOW May 4, 1948.

3 Sheets-Sheet 1 Filed May 15, 1944 J07??? 1%? UreZz'nQZ 69 Paw Q SearchRoom y 1943- J. R. ORELIND 2,440,732

TWO-WAY PLOW Filed May 15, 1944 3 Sheets-Sheet 3 ,13 70628 07: J07z7z (3are Zz'rzd $9 W daze Patented May 4, 1948 Search Room TWO-WAY PLOW JohnR. Orelind, Wilmette, Ill., assignor to International Harvester Company,a corporation of New Jersey Application May 15, 1944, Serial N0. 535,633

15 Claims.

This invention relates to agricultural implements and, moreparticularly, to a two-way plow of the trailing type having a pair ofplow units arranged for alternate operation.

Two-way plows are well known in the agricultural industry. Theiroperation permits the cutting of adjacent furrows, the rear wheel on oneside or the other of the tractor by which the plow is drawn beingadapted to always travel in the previously made furrow as the plow movesback and forth across the field. This is essential to establish theposition that the alternately working plow bottom must occupy withrespect to the tractor wheel traveling in the furrow in order tomaintain a uniform width of cut.

One of the objects of this invention is the provision of a novel two-wayplow adapted to be propelled by a tractor and to assume the properplowing relationship with the furrow wheel of the tractor.

Another object is the provision of a two-way plow having means forsimultaneously leveling the plow and adjusting its depth of operation.

Another object is to provide a two-way plow of novel constructionwherein the alternately operable plow units are hingedly connected forrelative movement about a longitudinal axis.

Still another object is to provide, in a. twoway plow having hingedlyconnected plow units, a mechanism for laterally shifting th e plow hitchin response to alternate operation g f themunfts",Respective"orthereratrfit'figfiiarity of the plow units.

Other objects and advantages of the invention will become clear from thefollowing detail description when read in conjunction with theaccompanying drawings, wherein:

Figure 1 is a View in perspective of a plow embodying the features ofthe present invention;

Figure 2 is a detail in perspective showing the method of joining theaxles of the plow shown in Figure 1;

Figure 3 is a detail in perspective and partly in section of a portionof the plow of Figure 1;

Figure 4 is a diagrammatic illustration of the plow of the presentinvention attached to be drawn behind tractors of diflerent widths;

Figure 5 is a detail of. a portion of the lifting mechanism;

Figure 6 is a schematic elevation of the plow in operating positionshowing the relationship of parts; and

Figure 7 is a view similar to Figure 6 with the left-hand plow unitoperating at a shallower depth, and showing the new angle assumed by theaxles.

In the drawings, the plow of the present invention is shown as includinga pair of laterally spaced, longitudinally extending rightand lefthandplow units It and II, respectively. The

structure of each of these plow units is substantially the same, and adescription of one will sufiice for both. Each plow unit comprises alongitudinally extending beam |2 curved downwardly at its rear end andhaving afiixed thereto a plow bottom l3. The plow bottoms on the unitsl0 and II are respectively rightand lefthand bottoms and are adapted foralternate operation when the plow reverses its direction in a field.

Laterally spaced from beam I2 is a brace I4 extending forwardly to apoint in alinement with the forward end of beam l2 and bent rearwardlyfor attachment by bolts l5 to beam |2 near its rear end. The spacedforward portion of brace N' is afllxed to beam |2 by a spacer i6 havinga transverse portion Attached to beam l2 and brace I4 are depending,laterally spaced bearing brackets I8 and I9 having bearing portionsadapted to receive for rotation the transverse portion 20 of a crankaxle 2| having a rearwardly bent arm portion 22 at the outer endthereof.

To the rearwardly extending end of arm 22 is attached a housing 23, 'inwhich is mounted a transversely extending stub shaft 24 journaling asupporting wheel 25. The inner end of shaft 24 extending through thehousing 23 is provided with a crank 26 (see Figure 5) adapted to beintermittently rotated through the actuation of a half-revolution clutch2'! of conventional construction, actuated by a trip lever 28, havingattached thereto a rope 29 extending forwardly to a position accessibleto the operator of a vehicle, by which the plow of the present inventionmay be drawn. A simple pull upon the rope 29 thus releases the clutch 21to cause rotation of the crank 26, the clutch being normally biased tolocked position by a spring 30 connecting lever 28 to housing 23.Lifting of the plow units is accomplished through rotation of wheel 25and actuation of clutch 21 by a link 3| connecting crank 26 with braceI. This link 3| comprises a sleeve member 32 and a threaded crank member33 received in the sleeve 32, the upper end of the sleeve beingpivotally mounted between a strap 34 and the brace I4. The forward endof strap 34 is aflixed to brace H by a bolt 35, and the rear end thereofspaced from the brace is connected thereto by an angle member 36. Crank26 actuated by clutch 21 is adapted to rotate through one half of arevolution each time the lever 28 is tripped. Thus, movement of wheel25, operating through clutch 21, crank 26, and link 3|, is transmittedto the plow units Hi and to move them vertically about their pivot uponthe transverse portion 20 of axle 2|. Link 3| is made extensible inorder to adjust the depth of operation of each of the plow elements l0and II independently by varying the relationship of beam |2 to wheel 25.This adjustment is accomplished by manipulation of the crank 33.

The plow units and II are similarly equipped with lifting mechanism sothat the units may be independently lifted for alternate operation, orthey may both be placed in raised position for transport purposes.

The inner end of each crank axle 2| is provided with a rearwardly bentportion 31 extending rearwardly and generally parallel to the outer armportion 22. The portions 31 of each crank axle 20 are in juxtapositionand mounted for pivotal movement about the axis of portion 31 in abearing member 38 extending a substantial part of the length of theportions 31 to hold them securely in place while permitting independentpivotal movement thereof. This may be observed particularly well inFigure 2. Suitable means such as cotter pins may be utilized to preventdisplacement of the axles from the bearing member 38.

Bearing 38 serves as a, support for an adjusting mechanism generallyindicated at 39 and including a quadrant 40 and a lever 4| pivoted at 42thereupon for movement thereover. Likewise attached to quadrant 40 at 42are downwardly extending legs 43, the lower ends of which are attachedto upwardly extending lugs 44 at the forward end of bearing 38. A strap45, likewise attached to the quadrant and extending downwardly andrearwardly, is secured to a lug 46 at the rear end of bearing 38.Quadrant 40 is further braced by a strap 45 extending from strap 45 toan arcuate portion of quadrant 40. The customary detent mechanism 41 isprovided for engagement in notches 48 of the quadrant.

Attached to the lever 4| at a point spaced somewhat from its pivot 42 isa pair of rods 49, each of which extends downwardly and outwardly and isconnected to the transverse portion 20 of axle 2 l At this point itshould be clear that axles 2| are restrained from pivotal movement aboutthe axes of portions 21 by the adjusting mechanism 39. Likewise, itshould be clear that movement of the arm 4| over the quadrant 4|] willexert a force through the rods 49 to cause pivotal movement of axles 2|.Thus axles 2| may be laterally tilted with respect to each other to anydesired angle within the limits of the adjusting mechanism 39 for apurpose that will hereinafter become clear. Axles 2| on each side of theplow are urged to pivotal movement about the axes of the portions 31 bya spring 492 connected to brackets 4S! on the axles 2|.

As pointed out before, the plow of the present invention is a two-wayplow having units adapted for alternate operation; that is, when theplow is traveling in one direction, one of the plow bottoms is inoperating position while the other plow bottom is raised, and when thedirection of travel of the plow is reversed, the other plow bottom isplaced in operation. The depth of operation of the plow bottom, that is,the depth at which the plow bottom penetrates the soil, is in partregulated by the adjusting mechanism 39 above described. This adjustingmechanism causes the crank axles 2|, upon which the plow units aremounted for vertical pivotal movement, to assume various angularpositions with respect to each other, the depth of plowing varying withthe degree of angularity. The change in angle assumed by the axles whenchanging from deep to shallow plowing is illustrated in Figures 6 and'1. Since manipulation of the adjusting mechanism 39 causes lateraltilting of the plow units l0 and II in the manner of a hinge, thisadjusting mechanism likewise serves simultaneously for leveling the plowbottoms. If desired, additional means, not shown, may be provided foradjusting the angle of each plow bottom with respect to its associatedcrank axle. Independent adjustment of the plow for securing greatercontrol of the operating depth of the plow units is effected bymanipulation of the crank 33, which regulates the position of the plowbottom with respect to its adjacent wheel. This adjusting device isprincipally useful in securing proper adjustment at the beginning of aplowing operation and when changing the air pressure in pneumatic tires.

At the forward end of beam I2 and mounted between the beam I2 and itsassociated brace I4 is a king bolt 50 upon which is pivoted for forwardand rearward rocking movement a member 5|. Member 5| includes a yoke 52having arms apertured to receive the bolt 50 for pivotal movementthereupon and a depending shank portion adapted to receive fortelescoping movement a shaft 53. Shaft 53 is provided with a pluralityof openings 53 for the reception of a pin 53 passing through the yoke 52to adjust the length of the member 5| to a number of positions. To thelower end of shaft 53 is connected a coupling 54. To the coupling 54 forright-hand plow unit In is connected for pivotal movement a forwardlyextending hitch member 55, and to coupling 54 for plow unit H isconnected a hitch member 56. Hitch members 55 and 56 extend forwardly,and member 56 is connected to member 55 at 51, thus forming a triangularhitch frame 58. The forward end of the hitch member 55 is provided witha clevis 59 for attachment to the draw-bar of a tractor or other sourceof draft power.

It should now be understood that a two-way plow has been describedhaving alternately operable plow units and longitudinallypivotablemembers on the front ends thereof, whereby the hitch frame 58,which serves to connect the plow to a tractor or other vehicle, may bepermitted to move laterally to cause the working plow unit to assume thecorrect plowing position with respect to its adjacent tractor wheel andproduce furrows of uniform width as the plow travels back and forthacross the field. Assuming the tractor drive wheels to be of a certainlateral spacing, the plow bottoms will assume correct plowing positionwith regard to the respective tractor wheels without movement of thehitch point. On the other hand, if a tractor be employed having anarower or wider rear wheel spacing, the hitch point must be movedlaterally in one direction or the other to permit the supporting wheelof the working plow unit to travel in the previously made furrow behindthe adjacent tractor wheel. To accomp ish this purpose, one of themembers 5| must beallowed to pivot while the other is held rigid. 'n'orthis reason a locking mechanism is provided for each pivotable member5|, which may be automatically released in response to movement of theplow bottoms to working position. The mechanism by which this isaccomplished is to be presently described.

Attached to the lower end of yoke 52 by bolts 60 is a rearwardly andupwardly'curvedarcuate. member 6| which is slidably received in abracket 62 attached to the transverse portion H of spacer I6. Member 5|is provided with a plurality of openings 53, and an adjustable stopmember 54 is provided having a pin 65 receivable inone of Search Roomthe openings 63. Member 64 is adapted to abut against the upper edge ofbracket 62 to serve as a stop and to limit the telescoping movement ofmember 6| in bracket 62. Another stop member 66 is provided on member 6|and has a rearwardly extending overlapping lip 61. Maximum telescopingmovement of member 6| in bracket 62 is obtained by placing the pin 65,holding stop member 64, in one of the rearmost openings 63. Thenpivotable member has longitudinal rocking movement within a rangedetermined by the distance between the stop members 62 and 66. When noextension of the telescoping parts is desired, as when the plow is drawnbehind a tractor having a rear wheel spacing requiring substantially nomovement of the plow hitch frame in order to correctly position theworking plow bottom with respect to its adjacent tractor wheel, the pin65 is withdrawn and the stop 64 moves downwardly and forwardly on themember 6| until the pin can be inserted in one of the forwardmostopenings 63. In this position the stops 64 and 66 are closely adjacenton opposite sides of the bracket 62.

The plow of the present invention has been designed to trail behind atractor having a rear wheel spacing of approximately sixty-four incheswithout movement of the telescoping parts, with out rocking movement ofmember 5|, and without lateral movement of the hitch frame 58 other thanthat caused by the slight rearward deflection of the lower end of one ofthe pivotable members 5| due to the angle assumed by the raised plowunit. For extremes of narrow and wide tractor wheel spacings, as forexample forty and eighty-four inch spacings, the stops 64 are moved to aposition near the end of arcuate member 6|, as indicated in Figure 1,thus securing maximum extension of the telescoping parts. The otheropenings 63 may be utilized to vary the extent of movement of thetelescoping parts, and therefore lateral movement of the hitch frame 3I, to conform to tractor wheel spacings of vary ing widths. and in thesolid lines in Figure 4, the plow is shown being drawn by a tractorhaving a rear wheel spacing of eighty-four inches. It will also be notedthat the right-hand plow unit is in working position, and that theright-hand pivotable member 5| has been moved forwardly and theleft-hand pivotable member moved rearwardly to cause lateral movement ofthe hitch frame 58 to the left, thus bringing the working plow bottominto correct plowing position with respect to the right-hand tractorwheel, as indicated diagrammatically in Figure 4. Conversely, when thedirection of plowing is reversed and the left-hand plow unit replacesthe right-hand unit in working position, the left-hand member 5| must bemoved forwardly and the right-hand member 5| retracted to cause hitchframe 58 to move to the right and bring the working plow bottom intocorrect position with respect to the left-hand tractor wheel.

On the other hand, when, as indicated in dotted lines in Figure 4, atractor having a rear wheel spacing of forty inches .is employed, inorder for the right-hand plow bottom to assume proper relationship withthe right-hand tractor wheel, the left-hand pivotable member 5| must bemoved forwardly and the hitch frame 58 moved to the right and vice versaupon reversing the direction of plowing. These movements of the hitchframe are actuated by movement of the inoperative plow unit to workingposition 75 spacing of eighty-four inches.

It will be noted that in Figure'l,

through the intermediary of a mechanism now to be described.

As pointed out before, maximum extension of the telescoping parts 6| and62 is obtained when the pin 65 is inserted in one of the rearmostopenings 63 in arcuate member 6|. These parts are held against extensionwhen the plow is in transport position by a locking device, and the lockon one plow unit is released when one plow bottom is lowered to workingposition. This locking mechanism and the means by which it is actuatedinclude a pair of transverse shafts 68 and 66 rotatably mounted inopenings in brackets 16 aifixed to the beams l2 and extending throughopenings in brackets 62. Upon the portions of shafts 68 and 69 extendingthrough the bracket 62 are aflixed rockers 1|. Each rocker 1| comprisesa pair of laterally spaced straps 12, the lower depending ends of whichare separated by a roller 13. The inner end of shaft 68 is bent upwardlyand is connected by an adjustable link 14 to an arm 15 projectingoutwardly from the lower end of a sleeve member 16 mounted upon a bolt11 seated in a flange 18 which is a part of the bearing member 38. Theinner end of shaft 69 is bent in a manner similar to shaft 68 andsimilarly connected by an adjustable link I8 to an arm 86 projectingoutwardly from the upper end of a sleeve 8| mounted upon a bolt 82seated in flange 18 at a point laterally spaced from the bolt 11. Theupper ends of bolts 11 and 82 are connected by a brace 83. Sleeves l8and 8| are provided with outwardly projecting flanges 84 adapted toengage pegs 85 projecting from brackets 18, as is clearly shown inFigure 3. Each of the arms 15 and is connected, respectively, by springs86 and 81 to 9. lug 88 projecting upwardly from bearing member 88, thusbiasing said arms rearwardly.

In Figure 1 it will be noted that the right-hand plow unit is in workingposition, and that the lefthand plow unit is raised. In this positionthe left-hand pivotable member 5| is locked by insertion of the roller13 of the locking mechanism under the lip portion 61 of stop 66 whilethe righthand locking member has been released. Assuming now that itisdesired to reverse the direction of plowing, and that plow unit II isto replace plow unit ID in working position, the operator then pulls onthe rope 29 on each side of the plow in order to actuate the clutches 21and cause plow unit II to descend to working position while plow unit l0rises to transport position. As shown clearly in Figure 3, as plow unitII descends, the pin engaging flange 84 rotates sleeve 8| about the bolt82 and causes arm 80 to move forwardly. This movement of arm 88 actsthrough link 19 and theupturned portion of shaft 66 to rotate shaft 68on its axis and move rocker 1|' out of engagement with stop 66. At thesame time as the plow unit I 6 rises, the pin 88 associated therewithmoves forwardly, and arm I; 'urged by its spring 86 moves rearwardlyrocking shaft 68 in a direction opposite to that of shaft 68. At thesame time, draft upon the plow, causing forward pivoting of left-handmember 5 also causes retraction of right-hand member 5| and-telescopingmovement of its associated member 8|. When stop 68 on the right-handmember 6| reaches a position adjacent the rocker] I the lip portion 61thereof is engaged by the roller 18. Thus, in Figure 1, and in fulllinesin'Figui'e 4, the plow of the present invention is shown as beingdrawn behind a tractor having a rear wheel When the plow is to be drawnbehind a tractor having a rear wheel spacing of forty inches, asindicated in dotted lines in Figure 4, it is necessary that when theright-hand plow unit is to be placed in working position, the left-handpivotable member be moved forwardly and the righthand pivotable membermoved rearwardly in order that the hitch frame 58 may be swung to theright. This brings the right-hand plow unit into correct plowingposition with respect to the right-hand tractor wheel. In order toaccomplish this, only a simple adjustment is required. As will be notedin Figures 3 and 4, the arms 15 and 80 are provided with two openingsfor the reception of the'respective links 14 and 19. Now link 14 isreleased from arm I5 and connected instead to arm 80, while link 19 isreleased from its connection with arm 80 and transferred to arm 15, asindicated in dotted lines in Figure 4. With this arrangement, when theright-hand plow unit I is to be placed in working position, the pin 85associated therewith moves rearwardly as the plow unit drops and urgesflange 84 rearwardly and arm 15 forwardly rotating shaft 69 to releaserocker H on the left-hand side of the tractor from its engagement withstop 66, thus permitting telescoping oi' the arcuate member 6! inbracket 62. At the same time as plow unit H is raised to inoperativeposition, its associated pin 85 moves forwardly, arm 80 movesrearwardly, and through its connecting link 14, rotates shaft 68 tocause roller 13 to engage the lip 61 on stop 66 on the right-hand sideof the plow as the member is moved rearwardly in response to draft uponthe draft frame.

When both of the plow units l0 and H have been raised to inoperativeposition for transport purposes, a mechanism is provided to oflset theweight at the rear of the plow beams l2 in order to hold the plowbottoms in the air. This mechanism comprises a chain 89 attached at itsforward end to a clip 90 connected at 51 to the hitch frame 58. The rearend of chain 89 is connected to the quadrant 40 by a yoke 9|.

It should now be understood that a novel twoway plow has been describedwherein means are provided for lateral tilting of oneof the plow unitswith respect to the other, the units being mounted upon separate crankaxles which are hingedly connected together for pivotal movement about alongitudinal axis. Likewise, novel means have been provided foradjusting the relative angularity of the two plow units by which thedepth of operation thereof may be adjusted at the same time that theplow units are leveled.

Having described the invention in its preferred embodiment, it should beunderstood that modifications may be made therein without departing fromthe spirit Of the invention or the scope of the appended claims.

What is claimed is:

l. A two-way plow comprising a pair of laterally spaced plow unitsadapted for plowing in opposite directions, each said unit including acrank axle, a longitudinally extending plow beam pivotally mounted oneach said axle for vertical movement, a supporting wheel on each saidaxle, and means for connecting said plow units together for hingedmovement on a longitudinal axis to provide for lateral tilting ct oneunit with respect to the other.

2. A two-way plow comprising a pair of laterally spaced plow unitsadapted for plowing in opposite directions, each said unit including acrank axle, a longitudinally extending plow bee/m pivotally mounted oneach said axle for vertical movement, a supporting wheel on each saidaxle, means for connecting said plow units together for hinged movementon a longitudinal axis to provide for lateral tilting of one unit withrespect to the other, and adjusting means for effecting relative lateraltilting of said units.

3. A two-way plow comprising a pair of laterally spaced plow unitsadapted for plowing in opposite directions, each said unit including acrank axle, a longitudinally extending plow beam pivotally mounted oneach said axle for vertical movement, a supporting wheel on each saidaxle, means for connecting said plow units together for hinged movementon a longitudinal axis to provide for lateral tilting of one unit withrespect to the other, and single adjusting means for simultaneouslyeffecting relative lateral tilting of said units.

4. A two-way plow comprising a pair of laterally spaced plow unitsadapted for plowing in opposite directions, each said unit including acrank axle, a longitudinally extending plow beam pivotally mounted oneach said axle for vertical movement, a'supporting wheel on each saidaxle, means for connecting said plow units together for hinged movementon a longitudinal axis to provide for lateral tilting of one unit withrespect to the other, adjusting means for effecting relative lateraltilting of said units, power means associated with each said wheel forvertically moving said plow units, and independent adjusting means oneach plow unit for varying the operating depth thereof.

5. A two-way plow comprising a pair of laterally spaced plow unitsadapted for plowing in opposite directions, each said unit including acrank axle having a transverse portion and generally parallellongitudinally extending inner and outer portions, a supporting wheel oneach said outer portion, a hinged connection between the inner portionsof said crank axles to provide for lateral tilting of one unit withrespect to the other, and single adjusting means for efiecting relativelateral tilting of said units.

6. A two-way plow comprising a pair of laterally spaced plow unitsadapted for plowing in opposite directions, each said unit including acrank axle having a transverse portion and generally parallellongitudinally extending inner and outer portions, a supporting wheel oneach said outer portion, and rigid connecting means between the innerportions of said crank axles arranged to prevent pivoting of said axlesabout a transverse axis but to provide for lateral tilting thereof abouta longitudinal axis.

7. A two-way plow comprising a pair of laterally spaced plow unitsadapted for plowing in opposite directions, each said unit including acrank axle having a transverse portion and generally parallellongitudinally extending inner and outer portions, a supporting wheel oneach said outer portion, a longitudinally extending bearing between saidunits, means for pivotally mounting the inner portions of said crankaxles in said bearing for lateral tilting of one unit with respect tothe other about the axis of said inner portion, and single adjustingmeans for simultaniesously eflecting relative lateral tilting of said un8. A two-way plow comprising a pair 01' laterally spaced plow unitsadapted for plowing in opposite directions, each said unit including acrank axle having a transverse portion and generally parallellongitudinally extending inner and ocdrCn m outer portions, a supportingwheel on each said outer portion, a longitudinally extending bearingsleeve between said units, means for pivotally mounting the innerportions of said crank axles in said bearing sleeve for lateral tiltingof one unit with respect to the other about the axis of said innerportion, and means for preventing pivoting of said units including meansfor adjusting the relative angular relationship of said units about saidaxes.

9. A two-way plow comprising a pair of laterally spaced plow unitsadapted for plowing in opposite directions, each said unit including acrank axle having a transverse portion and generally parallellongitudinally extending inner and outer portions, a supporting wheel oneach said outer portion, a longitudinally extending bearing sleevebetween said units, means for pivotally mounting the inner portions ofsaid crank axles in said bearing sleeve for lateral tilting of one unitwith respect to the other about the axis of said inner portion, andmeans associated with said bearing sleeve and supported thereby forpivoting said units about the axes ofsaid inner portions to vary theangular relationship of said units.

10. A two-way plow comprising a pair of laterally spaced plow unitsadapted for plowing in opposite directions, each said unit including acrank axle having a transverse portion and generally parallellongitudinally extending inner and outer portions, a supporting wheel oneach said outer portion, a longitudinally extending bearing sleevebetween said units, means for pivotally mounting the inner portions ofsaid crank axles in said bearing sleeve for lateral tilting of one unitwith respect to the other about the axis of said inner portion, a leverand quadrant arrangement mounted on said bearing sleeve, and meansoperatively connecting said lever and each said axle, whereby said axlesmay be simultaneously pivoted to vary the angular relationship of saidunits.

11. A two-way plow comprising a pair of laterally spaced plow unitsadapted for plowing in opposite directions, each said unit including acrank axle having a transverse portion and generally parallellongitudinally extending inner and outer portions, a supporting wheel oneach said outer portion, a longitudinally extending bearing sleevebetween said units, means for pivotally mounting the inner portions ofsaid crank axles in said bearing sleeve for lateral tilting of one unitwith respect to the other about the axis of said inner portion, andmeans for simultaneously leveling said plow units and adjusting theoperating depth thereof, comprising a quadrant supported on said bearingsleeve, a lever movable over said quadrant. and means operativelyconnecting said lever and said axles for effecting simultaneous pivotingthereof.

12. In a two-way plow, a pair of laterally spaced plow units adapted foralternate operation, each said unit including a crank axle, a supportingwheel on said axle, and a longitudinally extending plow beam mounted onsaid axle for vertical pivotal movement, power means associated witheach said wheel for independently vertically mogmsaidplp w upitindependent adresist; means on e'a'h plow unit for varying the operatingdepth thereof, and means hingedly connecting said axles for relativelateral-tilting 7o l,503,722-;

of said units.

13. In a two-way plow, a pair oi laterally spaced plow units adapted foralternate operation, each said unit including a crank axle having atransverse portion, a supporting wheel on 79' irresmgfiive of th edusurp of 14. In a two-way plow, a pair of laterally spaced plow unitsadapted for alternate operation, each said unit including a crank axlehaving a transverse portion and longitudinally angled generally parallelend portions, a supporting wheel on the outer end portion of each saidaxle, a member connecting the inner end portions of said axles forpivotal movement about the axes of said inner end portions, alongitudinally extending plow beam mounted on each said transverseportion for vertical movement, lifting means operatively connecting eachsaid wheel and its associated beam for independently vertically movingsaid beam, including means for adjusting the operating depth or the plowunit, single means for simultaneously pivoting said axles to vary theangular relationship of said units, a hitch frame connected with theforwards-ends of said beams, and adjustable means interconnecting eachsaid beam and said hitch frame and actuable by vertical movement of saidbeam to cause lateral movement of said hitch frame irrespective of theangular relationship of said plow units.

15. A two-way plow com-prising a pair of laterally spaced plow unitsadapted for plowing in opposite directions, each said unit including acrank axle, a longitudinally extending plow beam mounted on said axlefor vertical movement, a supporting wheel on each said axle, power liftmeans for independently vertically moving said beams, means forconnecting said plow units together for lateral tilting of one unit withrespect to the other about a longitudinal axis, a hitch frame connectingthe forward ends of said beams, and adjustable means interconnectingeach said beam and said hitch frame for causing lateral movement of saidhitch frame in response to vertical movement of one of said beamsirrespective oi the angular relationship of said plow units.

JOHN R. ORELIND.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES P. .TENTS Number Name Date 613,454 Maddocks Nov. 1, 1898847,258 Parenti Mar. 12, 1907 1,260,079 Sivley Mar. 19, 1918 1,279,588Richei'eu Sept. 24, 1918 1,410,917 Hee Mar. 28, 1922 Strickland Aug.-5,1934v FOREIGN PATENTS Number Country Date 440,520 Germany Feb. 10,192! Great Britain -----...nc1v.'-2c, use

